accessible surface

基本解釋

An ideal den must be deep underground, where the earth is warm, but accessible from the surface via burrows or natural fissures.
理想的巢穴必須深入土壤很溫暖的地下，但可以通過(guò)地洞或自然裂縫從地面進(jìn)入。
By volume, only 3 percent of all water on earth is fresh water, and only about 1 percent is easily accessible surface fresh water.
依重量來(lái)看，只有3%在地球的水是新鮮水，只有差不多1%是趨近于表面新鮮水。
Clearance: Shortest distance between two conductive parts or between a conductive part and the accessible surface of the toy, measure through air.
兩導(dǎo)體之間或?qū)w與玩具可觸及表面間最短的空間距離。